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    Glossary
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r

Definitions:

  The number of blocks in the formatted input data (N, A, P).
Sources:
NIST SP 800-38C

  An integer that is less than or equal to 32, whose value is the bit length of the agreed-upon binary encoding of a counter i used as input during invocations of the PRF employed by a KDF.
Sources:
NIST SP 800-108r1 [August 2022 (Includes updates as of 02-02-2024)]